/**
 * Copyright 2011 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package com.google.solarchallenge.server.servlets.gwtservices;

import com.google.appengine.api.users.UserService;
import com.google.appengine.api.users.UserServiceFactory;
import com.google.gwt.user.server.rpc.RemoteServiceServlet;
import com.google.solarchallenge.client.rpc.LoginService;
import com.google.solarchallenge.server.domain.UserAccountDao;
import com.google.solarchallenge.server.servlets.login.LoginHelper;
import com.google.solarchallenge.shared.LoginCategory;
import com.google.solarchallenge.shared.dtos.UserAccountDto;

import javax.servlet.http.HttpSession;

/**
 * Server side implementation for GWT RPC {@link LoginService}.
 *
 * @author Arjun Satyapal
 */
public class LoginServiceImpl extends RemoteServiceServlet implements
    LoginService {
  @Override
  public UserAccountDto getLoggedInUserDTO() {
    UserAccountDto userAccountDto;
    HttpSession session = getThreadLocalRequest().getSession();

    UserAccountDao userAccountDao = LoginHelper.getLoggedInUser(session);

    if (userAccountDao == null) {
      return null;
    }

    // This is a hack to avoid user mistake at the time of signup for
    // Admins.
    UserService service = UserServiceFactory.getUserService();
    if (service.isUserAdmin()) {
      userAccountDao.setLoginCategory(LoginCategory.ADMIN);
    }

    userAccountDto = userAccountDao.toDto();
    return userAccountDto;
  }
}
